The same current is passed through the following. Which will show the strongest magnetic strength?

(a) straight conducting wire
(b) coil of wire
(c) solenoid wound on a wooden core
(d) solenoid wound on an iron core

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Solution

(d) solenoid wound on an iron core
It will show the strongest magnetic strength. It is strong enough to attract metal paper clips as well as big iron nails.

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Similar questions

An insulated copper wire is wound on a soft iron core. Current is passed through the coil such that at end ‘A’ the current flows anti- clockwise and a magnetic compass needle placed at other end ‘B’ of the coil.

i) If soft iron core is replaced by a cardboard tube, what will be the effect on the magnetic needle?

ii) What happens to the magnetic needle if the current is stopped?

Question 6
Commercial electric motors do not use

(a) an electromagnet to rotate the armature
(b) effectively large number of turns of conducting wire in the current carrying coil
(c) a permanent magnet to rotate the armature
(d) a soft iron core on which the coil is wound

i) What polarity is created at B?

ii) How is the magnetic compass affected when current flows through the coil?

Q. The figure shows a solenoid wound on a core of soft iron. Will the end A be a N pole or S pole when the current flows in the direction shown?

N = {2.5.10}^{3}

wire turns are uniformly wound on a wooden toroidal core of very small cross-section. A current

I

flows through the wire. Find the ratio

η

of the magnetic induction inside the core to that at the centre of the toroid.

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The same current is passed through the following. Which will show the strongest magnetic strength? (a) straight conducting wire (b) coil of wire (c) solenoid wound on a wooden core (d) solenoid wound on an iron core

(d) solenoid wound on an iron core It will show the strongest magnetic strength. It is strong enough to attract metal paper clips as well as big iron nails.

The same current is passed through the following. Which will show the strongest magnetic strength?

(a) straight conducting wire
(b) coil of wire
(c) solenoid wound on a wooden core
(d) solenoid wound on an iron core

(d) solenoid wound on an iron core
It will show the strongest magnetic strength. It is strong enough to attract metal paper clips as well as big iron nails.